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1

Investigation of piezoelectric influence oncharacteristics of mechatronic system

Buchacz A.

Journal of Achievements in Materials and Manufacturing Engineering

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2008

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Vol. 26, nr 1

41-48

EN

Purpose: The purpose of this paper is application of approximate method of solving the task of assignment the frequency-modal analysis and characteristics of mechatronic system. Design/methodology/approach: The main approach of the subject was to formulate and solve the problem in the form of set of differential equation of motion and state equation of considered mechatronic model of object. Galerkin's method to solving has been used. The considered torsionally vibrating mechanical system is a continuous bar of circular cross-section, clamped at one of its end. Integral part of mechatronic system is a ring transducer, extorted by harmonic voltage excitation, to be perfectly bonded to the bar surface. Findings: The parameters of the transducer have important influence of values of natural frequencies and on form of characteristics of the discused mechatronic system. The results of the calculations were not only presented in mathematical form but also as a transients of examined dynamical characteristic which were function of frequency of the excitation. Research limitations/implications: In the paper the linear mechanical subsystem and linear electric subsystem of mechatronic system has been considered, however for this kind of systems the approach is sufficient. Practical implications: The methods of analysis and obtained results can be base of design and investigation for this type of mechatronic systems. Originality/value: The mechatronic system created from mechanical and electric subsystems with electromechanical bondage has been considered. This approach is different from those considered so far.

2

Dynamical flexibility of discrete-continuous vibrating mechatronic system

Buchacz A.

Journal of Achievements in Materials and Manufacturing Engineering

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2008

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Vol. 28, nr 2

159-166

EN

Purpose: The application of approximate method for solving the task of assignment the frequency-modal analysis and characteristics of flexibly vibrating mechatronic system, because for considered case of boundary conditions exact and approximate methods for the coordinates are equivalent. Design/methodology/approach: Formulate and solve the problem in the form of a set of differential equations of motion and state equations of the considered mechatronic model of an object Galerkin's method was used. The considered flexibly vibrating mechanical system is a continuous beam, clamped at one of its ends. An integral part of the mechatronic system is a transducer perfectly bonded to the beam surface. Findings: The parameters of the transducer exert an important influence on the values of natural frequencies and on the form of the characteristics of the discussed mechatronic system. Research limitations/implications: The linear mechanical subsystem and linear electrical subsystem of the mechatronic system were analyzed and the theory Euler-Bernoulli is used for the beam; however, this approach is sufficient for such systems. Practical implications: Global approach is presented in the domain of frequency spectrum analysis. The methods of analysis and the obtained results my give grounds for designing and investigating this type of mechatronic systems. Originality/value: The mechatronic system created from mechanical and electric subsystems with electromechanical bondage has been considered. This approach is different from those considered so far.

3

Influence of piezoelectric on characteristics of vibrating mechatronical system

Buchacz A.

Journal of Achievements in Materials and Manufacturing Engineering

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2006

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Vol. 17, nr 1-2

229--232

EN

Purpose: Application of approximate method was main purpose of work to solution task of assignment of frequency-modal analysis and characteristics of mechatronical system. Design/methodology/approach: The problem in the form of set of differential equation of motion and state equation of considered mechatronical model of object has been formulated and solved. Galerkin’s method to solving has been used. The considered torsionally vibrating mechanical system is a continuous bar of circular cross-section, clamped on one end. A ring transducer, which is the integral part of mechatronical system, extorted by harmonic voltage excitation is assumed to be perfectly bonded to the bar surface. Findings: Parameters of the transducer have important influence of values of natural frequencies and on form of characteristics of considered mechatronical system. The poles of dynamical characteristic calculated by mathematical exact method and the Galerkin’s method have approximately the same values. The results of the calculations were not only presented in mathematical form but also as a transients of examined dynamical characteristic which are function of frequency of assumed excitation. Research limitations/implications: In the paper the linear mechatronical system has been considered, but for this kind of systems the approach is sufficient. Practical implications: In article other approach is presented, that means in domain frequency spectrum the analysis has been considered. Originality/value: The mechatronical system created from mechanical and electrical subsystems with electromechanical bondage has been considered. This approach is other from considered so far. Using methods and obtained results can be value for designers of mechatronical systems.

4

Modern applications of high frequency acoustooptics

Petrov V.

Optica Applicata

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2004

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Vol. 34, nr 4

597-606

EN

The milestone applications of high frequency acoustooptics are discussed. The acoustooptical (AO) components such as Bragg modulator (including standing and running wave modulators), deflectors, others on very high frequencies (up to 10 GHz) working in wide frequency range (up to 3 GHz) are considered. Some review of traditional and modern uses is given. The main principles and peculiarities of Bragg cells design are discussed. The results of experimental investigationappeart to correspond with theoretical predictions. The specific problems which are stipulated by a very high frequency range are considered. These are: great influence of sound attenuation; peculiarities of interaction geometry and light aperture formation; multilayer transducer features; electrical matching with electromagnetic power wave guide. The ways of optimizing the parameters of high frequency Bragg cells are discussed.